Elizabeth Warren fires back at Trump: 'Really? That's the best you could come up with?'

That's what the Massachusetts senator made clear in an exclusive interview with Mic, as she responded to presumptive Republican presidential nominee Donald Trump's new moniker for her: "Goofy Elizabeth Warren."

"Really? That's the best you could come up with? Come on. I thought Donald Trump said he was a guy that was good with words," Warren said in a sit-down with Mic's Zeeshan Aleem. The full interview will be available Thursday.

Source: YouTube

Warren vs. Trump: The real estate magnate's jab at the progressive favorite came during a Twitter broadside against Warren, who made waves with an impassioned warning against Trump's "toxic stew of hatred and insecurity."

RELATED: Elizabeth Warren tweets about Donald Trump

9PHOTOS

Elizabeth Warren tweets about Donald Trump

See Gallery

Elizabeth Warren fires back at Trump: 'Really? That's the best you could come up with?'

Let’s be honest - @realDonaldTrump is a loser. Count all his failed businesses. See how he cheated people w/ scams like Trump U.

See how @realDonaldTrump kept his father’s empire afloat using strategic corporate bankruptcies to skip out on debt.

See how @realDonaldTrump kept his father’s empire afloat using strategic corporate bankruptcies to skip out on debt.

"I don't think he likes that." Asked why she thought Trump responded so viscerally, Warren said he fears being held accountable.

"I don't know if it's that Donald Trump is not used to people who stand up and challenge him, and I don't mean on silly stuff, or on personal stuff. This is really about the issues he's put on the table and talking about him, Donald Trump," she said, accusing him of "defrauding students" through the for-profit Trump University and "cheating others" by declaring bankruptcy.

"I don't think that's where Donald Trump wants to be, the idea that he has to be held accountable, I don't think he likes that," Warren continued. "I think he's actually a lot weaker than he wants to admit."